To adjust the Headlights on the......1999" to 2002" NBS Silverado's .......On each Headlight there are 2 Adjustment Hex Screws.....the One that is closest to the Radiator is for the Side to Side Adjustment and the other is for Up and Down Adjustment.

In the Below Diagram, number #9 and #10......are the Adjustment Screws for the Headlights,

Okay the reason i put the 99 is so people would know its the old body style. Whenever i put 2000 everyone thinks its a new body style. Its a 2000 classic old body style that i have no idea how to adjust the head lights

Okay the reason i put the 99 is so people would know its the old body style. Whenever i put 2000 everyone thinks its a new body style. Its a 2000 classic old body style that i have no idea how to adjust the head lights

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So if understand you.....the picture in your Avtar is the Chevy Truck your asking about, on how to Adjust the Headlights for??

.......If so here is a Diagram of the Front Headlight on the 98"/99" C-1500 Silverado.....Number #5 is for Up-n-Down Adjustment and Number #8 is for Side-to-Side Adjustment....for the headlights,